
url = 'https://pic.qiushibaike.com/system/pictures/11974/119744725/medium/app119744725.jpg'
print len(url)
node =url[url.find('.',len(url)-3):]
print node
name = url[url.find('.',len(url)-4)]

print name

print  url.find('.',79),url[url.find('/',len(url)-17):]

print url.split('/')[-1]

